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5
FUNCTIONS
5.5 Using the Latch Counter Function
5 - 29
1
OVERVIEW
2
SYSTEM
CONFIGURATION
3
SPECIFICATIONS
4
PROCEDURES AND
SETTINGS BEFORE
OPERATION
5
FUNCTIONS
6
UTILITY PACKAGE (GX
Configurator-CT)
7
PROGRAMMING
8
TROUBLESHOOTING
5.5 Using the Latch Counter Function
The latch counter function latches the present value (Un\G12 and 13) to the latch count
value (Un\G14 and 15).
The following two methods are available for latch operation.
• Turn ON the latch counter execution command (Y07) by the sequence program.
• Turn ON the latch counter input terminal (LATCH) of external input.
In (1) below, I/O numbers (X/Y) and buffer memory addresses are listed for channel 1. For
I/O numbers and buffer memory addresses used for channel 2 , refer to Section 3.3.1 and
Section 3.4.1.
(1) Operation of the latch counter function
Figure 5.14 Operation example of the latch counter function
ON
OFF
0
100
ON
OFF
0
150
100
50
4)
t*
*t 2ms
50
ON
OFF
t*
t*
t*
130
0
100
0
150
100
50
50
130
1)
2)
1) 3)
3)
1)
Count enable command
(Y06)
Present value
(Un\G12 and 13)
Latch counter
execution command
(Y07)
Latch counter
input terminal
(LATCH)
Latch count value
(Un\G14 and 15)